lid opening relay circuit

Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=137614
Printed Date: May 08, 2024 at 4:59 AM

Topic: lid opening relay circuit

Posted By: brams
Subject: lid opening relay circuit
Date Posted: November 07, 2014 at 1:49 AM

Hi guys,

Can anyone help me with a 12Vdc relay circuit or point me in the right direction on where to find one that will open a lid when the ignition is turned on & then close it when turned off. The circuit needs to drive a small 12Vdc motor in both directions to a limit switch at the top & bottom limits.
I've searched the net quite a bit but haven't been able to come up with anything yet :(
Any help for a noob would be much appreciated. Thanks

Replies:

Posted By: howie ll
Date Posted: November 07, 2014 at 10:18 AM

Use 2 x DEI 528t timer relays, make open controller POS trigger, make close NEG trigger and run both off the ignition.
I'll try and dig out a mirror fold diagram but it's the same idea.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Posted By: brams
Date Posted: November 07, 2014 at 12:12 PM

Thanks for the reply, I'd be really grateful if you could find that diagram. In the mean time I'll be reading up on those timer relays. Would I still need to use the limit switches or simply adjust the timer to open & close to the high & low limits?

Posted By: howie ll
Date Posted: November 07, 2014 at 12:49 PM

Just done the diagram, timed_open,_closed.png
Time the opening and closing times then add 1 second by adjusting the times via each 528t. The top 528 is open, lower close.
Thus limit switches not required.
If lid demands a 10 amp fuse, make the power supply 15 amps, the 528t is good for 20 amps.
This will be automatic on ignition on or off.
All colours are true except your ignition wire.

-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.